By Neil deGrasse Tyson
Published October 21, 2016 5:52pm
Neil deGrasse Tyson unravels time travel with the help of theoretical physicist Michio Kaku, “Back to the Future’s” Doc Brown, aka Christopher Lloyd, “Doctor Who’s” Missy, aka Michelle Gomez, and co-host Chuck Nice. Plus, Bill Nye takes a ride in the DeLorean.
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